Valve grinding tool



Dec. 9, 1941.

VALVE GRINDING TOOL Filed July 21, 1941 R. A. DOUGHERTY 2 265,130

Inventor fia mond /4. ,Dazyk erg Altorue Patented Dec. 9, 1941 UNITEDSTATES PATENT OFFICE VALVE GRINDING TOOL Raymond A. Daugherty, Tucson,Ariz.

Application July 21, 1941, Serial No. 403,448

4 Claims.

My invention relates to improvements in tools for use in conjunctionwith poppet valves of internal combustion engines in grinding suchvalves.

The principal object of the invention is to provide a simply constructedtool for positively gripping the heads of said valves and providing asocket for accommodating a screw driver, or the like, for rotating thevalve on its seat to grind the same.

Another object is to provide a device of the character and for thepurpose above set forth which is easily and quickly applied, adapted foruse with valves of different sizes and of either the dome or flat topvariety, and which is inexpensive to manufacture.

To the accomplishment of the above, and subordinate objects presentlyappearing, a preferred embodiment of my invention has been illustratedin the accompanying drawing, set forth in detail in the succeedingdescription, and defined in the claims appended hereto.

In said drawing:

Figure l is a view in side elevation of the preferred embodiment of myimproved tool applied to a poppet valve head.

Figure 2 is a view in top plan.

Figure 3 is a view in perspective of one of the clips.

Figure 4 is a view in perspective of the block in its preferredembodiment.

Figure 5 is a view illustrating blocks of different sizes in top plan.

Reference being had to the drawing by numerals, in its preferredembodiment my improved tool comprises a rectangular socket forming blockI provided with a central top slot 2 therein functioning as a kerf for ascrew driver, or other implement, not shown, said block having a centralthrough bolt hole 3 therein as best shown in Figure l. The block I maybe formed of any suitable metal and is of a size to fit within theconfines of the head 4 of a poppet valve 5 on top of said head.

A pair of duplicate, elongated, blade-like clips, or clamps, 6 ofresilient metal are provided for securing fiat to opposite sides of theblock I, respectively, said clips being each provided with a centralbolt hole I therein. For securing the clips 6 to said block I, a bolt 8is provided to extend through the clips 6 by way of said bolt holes Iand through the block I by way of the bolt hole 3, said bolt beingprovided with a nut 9 and lock washer I0 thereon.

The clips 6 are of a length to span the top of the valve head 4 toextend edgewise thereover at opposite sides of the block I and areprovided, respectively, with a pair of downwardly and inwardly inclinedlower edge prongs II at opposite ends thereof, respectively, adapted tobite into the upper edge rim I2 of the valve head 4.

As best shown in Figures 1 and 2, the distance between the prongs I I ofeach pair is suiiiciently less than the diameter of the valve head rimI2 so that when said clips 6 are drawn tight by the bolt 8 and nut 9against the block I, said clips are flexed inwardly toward each other toclampingly engage the prongs II sidewise against the rim I2 and therebycause said prongs to bite into said rim and anchor the block to thevalve head 4 in the center thereof. The clips 6 are provided with lowerconcave edges I3, whereby they are adopted for use with either fiat topvalve heads 4 such as shown, or, those having dome like tops.

For different sizes of valve heads longer blocks such as shown at I4,but, otherwise identical with that already described, may be provided tospace the clips 6 further apart and thereby adapt the same to clampagainst valve heads of larger diameters.

The manner in which the described invention is applied and used will bereadily understood. With the nut 9 loosened, the block I is positionedupon the valve head 4 and the clips 6 are moved inwardly, or toward eachother, over said head 4 until the prongs II engage the rim I2. The nut 9is then tightened to flex the clips 6 inwardly and force the prongs I Itight against the rim I2. Under said flexing of the clips 6 the prongsII are caused to bite laterally into said rim I2 and are drawn together,in each pair, and thereby caused to bite tangentially edgewise into therim I2 as will be clear. A screw driver, or hand valve grindingimplement, not shown, may then be inserted in the slot 2 and the valverotated through the medium of the described tool on its seat to grindthe same in the usual manner.

The foregoing will, it is believed, suffice to impart a clearunderstanding of my invention without further explanation.

Manifestlmthe invention, as described, is susceptible of modificationwithout departing from the inventive concept and right is hereinreserved to such modifications as fall within the scope of the appendedclaims.

Having described the invention, what is claimed as new is:-

l. A device of the class described for attachment to the head of apoppet valve comprising a block-like member adapted to be imposed on topof said head and constructed and arranged to provide a tool grip, a pairof blade-like clips upon i posite sides of said member respectively,adapted to span said head and extend edgewise thereover for dampingagainst opposite sides of the member, said clips being provided,respectively, with a pair of edge prongs at opposite ends thereof forbiting into the rim of said head when clamped to said member, andmanipulative means for clamping said cl-ips-to said'=--1;nen-rber.

2. A-device 'of the '-class described-for attachment to the head of apoppet valve comprising a block-like member adapted to be imposed on topof said head and constructed and arranged to provide a tool grip, a pairof blade like 'cl'n'as opposite sides of said member respectively,adapted to span said head and extend edgewise thereover for clampingagainst opposite sides of the member, said clips being provided,respectively, with a pair of edge prongs at opposite ends thereof forbiting into the rim of said head when clamped to said member, andmanipulative mean for clamping said clips to said member, said clipshaving concave lower edges adapting 10 -the-same to -span dometop-valve:heads.

upon opposite sides of said member respectively,

adapted to span said head and extend edgewise thereover for clampingagair'ist oppos'ite sides of the member, said clips being provided,respectively, with a pair of edge prongs at opposite fids *tnereof 'forbitingintd-the rinf of said head wnen clamped to said mnibefi andinanipfilativ means for" "c'lair'ipiiig *"said bl-ips' to saidm'mberfisaid ifieansebmprismga; bolt extenaing ahreugh said memberandbl'ips 'a nd having aj-nutthereon.

4. A device of the-' classdescribed for attachment to the head of apoppet valve comprising a bIOCk-llk member adapted to be imposed on topof said head and constructed and arranged to pro'v'ide a tool grip, apair of blade-like clips upon opposite sides of said memberrespectively, adapted to'span said head and extend edgewise ther'eoverfor clamping against opposite sides of the member, said clips beingprovided, respec-' 2Q tiv'elyfwith a pair of edge prongs at oppositeends thereof for :bitinginto the rim" of said head 'when clamped -tosaid-.-rmen1ber, and *manipula- "tive means for clam-ping: said clips=to=said member, said clips having concave lower edges=adapt- ---ing thesame-150* spanidome topvalve heads, said memberhaving a top' kerfthereon for accommodati'rig the bitof a'. 'scre'w :driveror the like forrotating said 'deviceeand valve to grind :the same.

RAYMOND A. DOUGHERTY.

